JP2015048915A5 - - Google Patents

Claims (2)

前記外側外輪軌道の内径が前記内側外輪軌道の内径よりも大きく、前記外側内輪軌道の外径が前記内側内輪軌道の外径よりも大きく、この外側内輪軌道と前記外側外輪軌道との間に設けられた外側列の玉のピッチ円直径が、前記内側内輪軌道と前記内側外輪軌道との間に設けられた内側列の玉のピッチ円直径よりも大きい、請求項１に記載した車輪支持用転がり軸受ユニット。
The larger than the inner diameter of the outer ring raceway is an inner diameter of the inner ring raceway, the greater than the outer diameter of the outer ring raceway outer diameter of the inner ring raceway, provided between the outer ring raceway and the outer ring raceway The wheel support rolling according to claim 1, wherein a pitch circle diameter of the balls in the outer row formed is larger than a pitch circle diameter of the balls in the inner row provided between the inner inner raceway and the inner outer raceway. Bearing unit.
前記中間素材を、前記最終中間素材に加工する以前に、内面に前記部分円弧に見合う形状を有する予備仕上金型内で塑性変形させて、軸方向中間部外周面の断面形状を前記部分円弧とした予備最終中間素材とした後、この予備最終中間素材を前記仕上金型内にセットしてこの予備最終中間素材の軸方向中間部外周面を塑性変形させ、前記凹曲面、前記外側内輪軌道及び前記環状凸部を形成する、請求項３に記載した車輪支持用転がり軸受ユニット用ハブの製造方法。
Before processing the intermediate material into the final intermediate material, plastic deformation is performed in a pre-finishing mold having a shape corresponding to the partial arc on the inner surface, and the cross-sectional shape of the axially outer peripheral surface is defined as the partial arc. After setting the preliminary final intermediate material, the preliminary final intermediate material is set in the finishing mold, and the outer peripheral surface in the axial direction intermediate portion of the preliminary final intermediate material is plastically deformed, and the concave curved surface, the outer inner ring raceway, and The manufacturing method of the hub for rolling bearing units for wheel support described in Claim 3 which forms the said annular convex part.